Ansel Adams was an American photographer and environmentalist known for his black-and-white landscape photographs of the American West. His work played a crucial role in promoting conservation efforts in the United States. Adams' iconic images, such as 'Moonrise, Hernandez, New Mexico' and 'The Tetons and Snake River,' continue to be celebrated for their technical excellence and artistic vision. He co-founded the Group f/64 with other prominent photographers, advocating for a sharp focus and maximum depth of field in photography.